public async Task <IActionResult> GetQuiz(int id)
        {
            int currentUserId = User.Claims.GetUserId();

            AzureBlobService blobService = new AzureBlobService();
            await blobService.InitializeBlob();

            Quiz quiz = quizRepository.GetQuizById(id);

            if (quiz == null || quiz.UserId != currentUserId)
            {
                return(NotFound("Quiz doesn't exist"));
            }

            quiz.PictureUrl = blobService.urlPath.AbsoluteUri.ToString() + "users/" + quiz.PictureUrl;
            QuizViewModel quizVm = this.entityToVmMapper.Map(quiz);

            return(Ok(quizVm));
        }